def whilecircle():
    i=0
    while i<=1000:
        print("病树前头万木春，离开python绝人生！",i)
        i+=1
def greeting():
    print("你好，你想呀玩什么呢？")
    a=["whilecircle","","","","",""]
    for i in range(len(a)):
        b+=["a[i]","(","i",")"]
    c=input(b)
    try:
        c=int(c)
        if c<len(a):
            globals()[a[i]]()
        else:
            print("暂时还未开发！")
    except Exception:
        print("输入数字！")
greeting()
    
    
